Help me Plz!! ASAP!

Which logarithmic equation is equivalent to the exponential equation below? e^a=55(you will receive 34 points)

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?